Thanks rolla16v,
I found out today that one of the sellers has an older (smaller) model for $180 and a newer one (larger) for $220. Both are apparently in good cond and start and run well. He just wants to sell one of them and he doesn't care which one he keeps.
The other seller has the older model (smaller) one but it's been in the shed for several years and isn't running and he wants $50 for it.
I wonder if I should buy the older model from the first seller and then buy the $50 one as a parts machine?
Are important parts still available for these edgers?